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I need to somehow quantify how a given driver approaches curves (i.e. driving style - does he/she drives aggressively or not). For this, I divided the problem into two sub-problems:

Step 1: Define curves by estimating angles

Step 2: Estimate the speed change or acceleration at these curves.

I am not sure that my approach is the best one. I would appreciate a link to some online resource where similar problem is discussed. I also appreciate any idea of how to evaluate a driving style at curves. Finally, I don't know how to perform Step 1, so any help is welcome.